vowels = set('aeiou')
word = input("Provide a word to search for vowels: ")
found = vowels.intersection(set(word))
for vowels in found:
    print(vowels)

# Provide a word to search for vowels: hitch-hiker
# e
# i

# -----------------------------
# Provide a word to search for vowels: Galaxy
# a

# -----------------------------
# Provide a word to search for vowels: life,the universe,and everything
# u
# e
# i
# a
# -----------------------------
# Provide a word to search for vowels: sky
# 无结果